问题
解答题
(1)分解因式:a3-ab2; (2)计算:(
|
答案
(1)a3-ab2=a(a2-b2)
=a(a+b)(a-b);
(2)(
)-1+|1-1 3
|-COS45°2
=3+
-1-2×2 2 2
=2.
(1)分解因式:a3-ab2; (2)计算:(
|
(1)a3-ab2=a(a2-b2)
=a(a+b)(a-b);
(2)(
)-1+|1-1 3
|-COS45°2
=3+
-1-2×2 2 2
=2.